General checklist:

If you are submitting a regular, still image:

If you have only one poster to upload, upload the full size version using the Primary Image button.

If you have severalvariations of the same poster that you want to submit, upload the main image using the Primary Image buttonfile, additional posters can be uploaded using the Secondary Image(s) button.

If you are submitting an animated GIF:

Create a 357 x 500 pixel version of your animated GIF and upload it using the Primary Image button.

Create a 860 x 1204 pixel version of your animated GIF and upload it using the Secondary Image(s) button.